Pursuer really wasn't that bad, he's very easy to dodge, I just wanted to get it done the fast way. Speaking of bosses...
Can't remember the name of the area I'm in, but the boss you fight there is basically in a pit of poisonous liquid, which, y'know, poisons you and drains your health, on top of making you move slow as fuck since you're waist high in the stuff.
So played through Ground Zeroes. If you don't know, it's basically a glorified demo for MGS5: The Phantom Pain. Ground Zeroes acts as a sort of epilogue to The Phantom Pain, to introduce fans to the games new gameplay mechanics and features (Reflex mode, the game being open world, vehicles, etc, etc). It's sold at a lowered price, I got it for $35, I think it's about $30 in the US. The main mission can be beat in half an hour, but there's several side missions, and the side missions all have their own little side challenges to beat. I'd say it's only worth it if you're a big fan of metal gear, and could see yourself replaying it a lot, I got through all the games content in about 3 or 4 hours, however I only have 34% on it, so there's still stuff for me to go back for.
Anyways, the game itself... Unlike previous games, MGS5 Ground Zeroes takes place in an open world environment, albeit a very small one (The Phantom Pain will have a much larger world), giving you a lot more freedom in how you want to get shit done. The gameplay has been streamlined a fair bit, Snake's movements are a lot more fluid, and you have a bit more freedom of movement, you can now sprint, climbing is faster and less clunky, and you can vault and jump over obstacles.
Features of more modern stealth games have been brought in as well, such as the ability to tag enemies (Like Far Cry 3, or the more recent Splinter Cell games) so you can track their movement, and there's also "Reflex", when an enemy spots you, the game will go slow motion, giving you a short opportunity to whip out your gun and pop off a shot at the enemy before they alert the others. What's nice is that if you don't like either of the two previously mentioned new features, you can disable them entirely from the options menu.
Speaking of enemies, they're a lot more dynamic this time around. In previous games, enemies had a short field of view, and if you entered that field of view you would be immediately spotted, or if they caught a glimpse of you they'd either pass it off as nothing, or take a look before quickly returning to their patrol. The enemies of MGS5 now have a longer field of view, but that doesn't mean they'll identify you as a target right away, they might shine a flashlight at you to get a better look, or even walk towards you to confirm if you're a friend or foe, if you move away before they can get a good look, they'll call up on the radio stating that they saw a suspicious person, and that they'd like reinforcements so they can investigate.
Anyways, I could go on and on, but I'm having a ton of fun with it. The PS4 version has its own exclusive mission where you explore the game world, and recreate scenes from MGS1, it's full of easter eggs and other fun secrets, you can even unlock a MGS1 Snake or Gray Fox costume to use during that mission, or dress the enemy soldiers up as Genome Soldiers.